THE BATTALION
WEDNESDAY, MAY 15, 1974
Pa«e 7
? at ion$ J
iristi—jj
; oastal lL
chnoW'lF nusua ^ new evidence that sup-
rts Dr. George F. Carter’s claim
the antiquity of man in America
been announced in California,
garter, Piper Professor of geog
jhy here, maintains that man has
d on the North American conti-
ijtit 100,000 years, as opposed to
1,000 to 20,000 years.
Evidence supports antiquity of man claim
and esirj
le nt, si
1 farming
eYelopi,
d harvest!
e prodiit^
soil,
eduction
h cott®
fossil hominid bones from California,
sites. It more than doubled the
generally-accepted time frame for\f
man in the New World.
Carter contends that glaciation
patterns require that the bones came
from hominids whose forebearers
crossed into the Americas in even
more ancient times, 80,000 or more
Anew technique for dating human years ago. The early men were be-
les bears out Dr. Carter’s con ten- lieved to have crossed on a Bering
Sea land bridge, exposed by glacia-
fhe bone protein dating system of tion locking sea water into ice and
Jeffrey L. Bada was applied to lowering the ocean level.
The oldest direct dates so far de-
ter/tnined for any New World
hominids were announced at a press
conference yesterday in La Jolla,
Calif. The conference was based on a
paper by Bada and Dr. Roy
Schroeder of the Scripps Institution
of Oceanography and Carter. The
paper is to be published in “Sci
ence,” journal of the American As
sociation for the Advancement of
Science.
Hominid bones horn sites near La
Jolla and Los Angeles were found to
be from 6,000 to 48,000 years old. At
intermediate steps were fossils of
26,000, 28,000 and 44,000 years age.
The Los Angeles samples, already
radiocarbon dated, were analyzed by
the protein technique as a check. Ac
ceptable agreement was found.
The bones were dated by measur
ing their aspartic acid racemization
reaction. Over long periods of
geological time, certain amino acids
found only in proteins of living or
ganisms undergo slow racemization,
or change, producing non-protein
amino acids. The ratio serves as a
kind of clock.
By chemically measuring the ex
tent of racemization in a fossil bone,
its age can thus be estimated.
The samples were from a series of
skeletal remains collected between
1920 and 1935 by the late M. J. Ro
gers for the San Diego Museum of
Man. They have since been stored at
the museum. Rogers once showed
Carter the sites and circumstances of
collection.
The dates “suggest that man popu
lated the New World substantially
earlier than 15,000 to 25,000 years
ago, the last time the Bering land
bridge existed,” the paper states.
“The most important inference
from the 48,000 year date is that man
was already in Southern California
before the last known possible cor
ridor through the Wisconsin glacia
tion,” Carter remarked. “It put a
sea-to-sea blockade across North
America.”
“For some time it was possible to
argue that man first entered America
through a corridor through the ice
mass about 30,000 years ago,” added
the TAMU professor, recently
named a Piper Professor through the
Minnie Stevens Piper Foundation of
San Antonio.
“But man in Southern California at
48,000 years ago, as shown by these
new findings refutes such argu
ment,” Carter said.
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